This falls squarely on cool and techie. I wanna get one just to have it... but ya know, that $20 could do better things. Maybe later

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It’s pretty hard to get excited about a USB cable, but the Dexim Visible Smart chargers are ridiculously cool in a super geeky way.

You need to watch the video below to see the effect, but basically the cable glows while it is charging or syncing to “visibly show the electrical current flowing through the cable.” The lights actually change speed based on the battery capacity of the iPhone, iPod, or iPad, with the animated lights moving quicker the lower the battery charge is, and finally stopping motion once the battery is charged.